Except “my Mac’s very secure and I can install whatever I want” is a complete fallacy. It isn’t secure - case in point Muse recently trawling through people’s messages. Or Mac cleaner like apps that trick users into installing them and giving liberal access.

I think if you don’t get the point of protecting a device against the user, you’ve not had to help un-tech savvy relatives get out of situations where dark or confusing UI practices have got themselves into a mess.